John Martin Reservoir

Bent County, CO

MAYBEConfidence · Low
Best bite window
The highlighted window has passed. This read is still based on the latest cached weather; use the 7-Day forecast below for the next window.
Main reason
dry conditions across the window
Main risk
a front passing through

MAYBE on John Martin Reservoir — light winds and rising pressure after a passing system for this window. Watch a front passing through. Weather-only read (no on-water history calibrating this yet).

Next forecast window
MAYBE

Tue · Oct 27, 4 AM → 8 AM (America/Denver)

Full read

The latest cached fishing-weather read for John Martin Reservoir in Bent County, CO is MAYBE. Its highlighted window has passed, so use the 7-day forecast below for the next available window. The main factor in its favor was dry conditions across the window, while the main watch-out was a front passing through. Its cached forecast evidence included wind near 4 mph out of the east, gusting to 9 mph; surface pressure near 884 hPa on a rising trend; 0.00 inches of rain; and air temperature near 52 °F with fog dominant. Confidence in this cached read is low; it was generated October 26, 2026, 8:51 AM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED October 26, 2026, 8:51 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
4mph

E · gust 9

Rain / Weather
0in

Fog

Temp
52°F

11°C · hum 96%

Pressure
26.10inHg

Rising

7-Day Fishing Forecast

One read per day — the bite call, the window, the weather behind it

  1. Mon · Oct 26
    Window passed
    MAYBE
    A front passing through
    59° / 48°F
    4 mph · Egust 17
    0.00 in
    ↓ -1.5 hPa
  2. Tue · Oct 27
    4 AM → 8 AM
    MAYBE
    A front passing through
    61° / 48°F
    7 mph · Egust 16
    0.00 in
    ↓ -9.4 hPa
  3. Wed · Oct 28
    6 AM → 10 AM
    MAYBE
    A front passing through
    72° / 52°F
    7 mph · Wgust 25
    0.00 in
    ↑ +5.6 hPa
  4. Thu · Oct 29
    4 AM → 8 AM
    MAYBE
    A front passing through
    66° / 50°F
    7 mph · NEgust 11
    0.00 in
    ↓ +2.3 hPa
  5. Fri · Oct 30
    4 AM → 8 AM
    MAYBE
    A front passing through
    63° / 52°F
    7 mph · Egust 17
    0.00 in
    ↓ +0.1 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    MAYBE
    A front passing through
    64° / 48°F
    7 mph · Egust 10
    0.00 in
    ↓ -5.0 hPa
  7. Sun · Nov 1
    4 AM → 8 AM
    MAYBE
    A front passing through
    64° / 52°F
    3 mph · Ngust 11
    0.00 in
    ↓ -2.5 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+7.8 hPa over 72h
Rain
Wet stretch
0.65 in totallast 72h
Wind
Gusty
9 mph · gust 35 · SE
Temperature
Cooler
-5.9°F over 72h82–43°F range

Weather-only read. Confidence is capped until local water data or feedback exists.

About John Martin Reservoir

John Martin Reservoir, in Bent County, CO, is Sometimes called a sapphire on the plains.

Elevation
3,851.87 ft
Managing agency
U.S. Army Corps of Engineers (owns/operates dam and reservoir); recreation managed by Colorado Parks and Wildlife under lease
Dam
John Martin Dam (Arkansas River)

Primary species: White bass, Hybrid striped bass, Black crappie, Saugeye, Walleye, Largemouth bass, Channel catfish, Freshwater drum, Flathead catfish, Blue catfish, Smallmouth bass, Bluegill.

Nearby waters

Weather data by Open-Meteo — CC BY 4.0. Fishing Weather derives the fishing read.